共沉淀法制备的锶铁氧体磁粉的结构、形貌及磁性能(1)

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1、万方数据·42·材料导报B：研究篇2012年5月(下)第26卷第5期Structure，MorphologyandMagneticPropertyofSr-ferritePowderSynthesizedbytheCo-precipitationRouteZHANGXian，MAYongqing，WUDandan，MAQian，ZANFenlian，ZHENGGanhong，WUMingzai，LIGuang(AnhuiKeyLaboratoryofInformationMaterialsandDevices，SchoolofPhysicsan

2、dMaterialsScience，AnhuiUniversity，Hefei230039)AbstractM-typeSr-ferritepowderwithFe3+toSr2+of10：1moleratiowassynthesizedbytheehemiealco-precipitation-calcinationroute．Thesamplesweresinteredatdifferenttemperaturesfrom800℃tol100℃inordertoinvestigatetheeffectsofsinteringtemperat

3、ureonthecrystalstructure。grainsize。morphologyandmagneticproperties．Thepowderswerecharacterizedbyinfraredspectra，powderX-raysdiffraction，．scanningelectronmicroscopyandvibratingsamplemagnetometer．Powderssinteredat1000℃showthebesthomogeneityintermsofsizeandmo-rphology，andposse戤

4、sthehighestsaturationmagnetizationof77．87emu／g．Powderssinteredatl100℃haveasphefi—calshapeandshowthelowestcoercivityof16010e．TheresultsalsoshowthatawiderangeofcoercivityvaryingfromlfiOlOeto45910ecouldbeobtainedbyselectingtheappropriatecalcinationtemperature．KeywordsM—typeSrfe

5、rrite，co-precipitation，nanoparticle，magneticproperty共沉淀法制备的锶铁氧体磁粉的结构、形貌及磁性能‘张贤，马永青，吴丹丹，马倩，昝芬莲，郑赣鸿，吴明在，李广(安徽大学物理与材料科学学院，安徽省信息材料与器件重点实验摩，合肥230039)摘要采用共沉淀法按照n(Fe)：n(Sr)；10；1合成M型锶铁氧体。通过把样品在不同的温度下退火，研完了退火温度对晶体结构、形貌和磁性能的影响。所制备的样品用FTlR、XR『)、sEM和VSM进行表征。结果表明，当退必温度为i000℃时样品颗粒分布规则且比饱和

6、磁化强度迭最大值，为77．87emu／g。当退欠温度为1100℃时样品颗粒变成球形且矫顽力最小．为16010e。此外，通过控制退火温度可使矫顽力在1601～45910e范围内变化。关键词M型锶铁氧体共沉淀法纳米颗粒磁性能中图分类号：TM277文献标识码：AM-typehexagonalferritessuchasstrontiumandbariumferrite(SrorBa)FelzOl9wereintensivelyinvestigatedinthepastdecadesbecausetheyhaverelativelylargesatur

7、ationmagnetization，highintrinsiccoercivity．andhighmagneticanisotropyfield，excellentchemicalstabilityaswellasIowcoatcomparedwithrare-earthcompounds，whichareconsi-derablyimportanttotheelectricalandmagneticproductssuchaspermanentmagnets，high-densitymagnetic．rrmgne—to-opticrecor

8、dingmedia，andmicrowavefiltersI-1．2]．FortheSrhexagonalferrite．itpossessesthe